For all anyone knows, someone may already be pregnant lol. It won't be in the code until the update the MC learns about it, I don't want you guys peeking haha.
The ramifications of the choices will start way before you 'see' the outcomes. (Dealing with the reality of having impregnated one or two of them will likely start out not being pleasant for the MC, but then end up great) The story is slow paced so most of the actual pregnancy stuff will be dealing with the early stages of pregnancy, and honestly I am still trying to mentally tackle the nightmare of actually having multiple optional pregnancies when it comes to rendering. Odds are for most of the game they won't really be at the showing stage, then a full update or two dealing with the later stages for whoever is currently pregnant(whether it be one or two or whatever). Just the logistics of having to try to do 10 to 20 times the renders for each scene depending on who is in it and who is pregnant....*shiver*. There likely won't be a situation where all of them are maybe pregnant and showing at once. It's either that or I force it to be either all or nothing which I don't really want to do.
Also keep in mind, some of the girls don't want to get pregnant and take actions accordingly, without the MC's knowledge(but not behind his back, that's why he hasn't REALLY asked about birth control in game, I wanted to leave it ambiguous). They won't even have the option to get pregnant until it is discussed and they change their mind, if they ever do. Some may want it, but not get pregnant right away even if they are trying.
By handling it his way, depending on how long the game runs(I assume everyone will get sick of the game before I do lol), I can spread out the extra work a little and make it much easier to handle and still have the updates that deal with the late stages of pregnancy have plenty of content for people who didn't choose pregnancy options for that particular girl or girls.